I think this iWidget pack will go nicely with this theme. Its Seperable Weather iWidgets. Each iWidget is its own entity, you can select only the iWidgets you need for your particular setup. The Code for each has been optimized only to include the necessary code to function. So these are great on RAM.

You have the options to select Font Styles, Size, Color, and alignment for the text based widgets.
The Weather Icon iWidget has many Icons sets to choose and the ability to change its size.
The Banner Name has a selectable Shine Animation Option.

These particular iWidgets will only work with the "unstable" version of iWidgets.

Credits to Ian and Dacal for the UniAW source code I used to create the Weather based iWidgets
ChevyMuscleCar for the Weather Icon Image sets
Durben, Schnedi and Gunny for showing great examples of how to code the options.plist
Schnedi for the original source code for the Text based clock.